I found the answer here; http://stackoverflow.com/questions/21596384/cannot-disable-systemd-serial-getty-service
My port is at ttyO0. so in my case I entered " systemctl mask [email protected]. I was able to confirm the device name by typing "systemctl --full". My device was in the list. Once I typed the command above and rebooted, I could use the serial port in my program. On Thursday, September 11, 2014 4:42:31 PM UTC-7, William Hermans wrote: > > ttyo0 has to be disabled in uEnv.txt, and also the board device tree file > I believe ( could be wrong on the last part ). Also, systemd may have a > service profile for it. I have not looked, and currently am not running > systemd. Maybe I'll check later once I get this rootfs working good, and > backed up. > > On Thu, Sep 11, 2014 at 3:02 PM, Lee Crocker <[email protected] > <javascript:>> wrote: > >> Some reason you can't just use one of the other UARTs? It's very handy to >> have a serial console for debugging. >> >> >> On Thursday, September 11, 2014 10:29:48 AM UTC-7, jgold wrote: >>> >>> I've got a RS232 micro cape http://www.logicsupply.com/ >>> components/beaglebone/capes/cbb-ttl-232/ that I need to use as a serial >>> port. The problem is that by default /dev/ttyO0 is setup as a login >>> console. I need to disable that so that I can use the port for my own >>> purposes. >>> >>> I've found instructions for how to do it on Rasbian but I can't find >>> anything for the Beaglebone. I found a line in /etc/inittab that looked >>> like it was starting a getty session on /dev/ttyO0 and I commented it out >>> but after a reboot, the login is still there. >>> >>> I found some references to inittab being obsolete because systemd >>> doesn't use it but I can't find anything to configure systemd so it doesn't >>> use ttyO0. >>> >>> Can anyone point me in the right direction? >>> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
